ORA-16002: database already open for read-write access by another instance

Cause : The database has been opened for read-write access by another instance, and cannot be opened for read-only access by this instance.

Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts

This instance must be opened for read-only access, or all other instances must first be shut down and re-opened for read-write access.

update : 18-08-2017

ORA-16002 - database already open for read-write access by another instance
ORA-16002 - database already open for read-write access by another instance

  • ora-36167 : (XSAGGRFORM) workspace object is an illegal AGGMAP for aggregating a FORMULA.
  • ora-06929 : CMX: error when sending ORACLE_SID
  • ora-13523 : unable to allocate required space for return type
  • ora-23533 : object "string"."string" can not be cached
  • ora-36188 : (XSAGGR16) AGGREGATE read a value less than 1 out of COUNTVAR variable workspace object. Either the values of the COUNTVAR variable are stored improperly, or there is problem in AGGREGATE. If no one has modified the values in this COUNTVAR, contact Oracle customer support.
  • ora-01940 : cannot drop a user that is currently connected
  • ora-24091 : Destination queue string is the same as the source queue
  • ora-16247 : DDL skipped on internal schema
  • ora-30683 : failure establishing connection to debugger
  • ora-25531 : MTTR specified is too small: string
  • ora-37116 : OLAP API table function error: (string)
  • ora-16211 : unsupported record found in the archived redo log
  • ora-16152 : standby database is in 'no-data-loss' protected mode
  • ora-19525 : temporary file for the clone database must be renamed
  • ora-01165 : MAXDATAFILES may not exceed string
  • ora-13264 : geometry identifier column string does not exist in table string
  • ora-27418 : syntax error in repeat interval or calendar
  • ora-12452 : label tag string already exists
  • ora-16782 : instance not open for read and write access
  • ora-01521 : error in adding data files
  • ora-19602 : cannot backup or copy active file in NOARCHIVELOG mode
  • ora-23402 : refresh was aborted because of conflicts caused by deferred txns
  • ora-32114 : Cannot perform operation on a null LOB
  • ora-06607 : LU6.2 Driver: Reset occurred in send state
  • ora-19870 : error reading backup piece string
  • ora-22931 : MOVE of nested table to a different tablespace not supported
  • ora-30358 : summary and materialized view are not in same schema
  • ora-33012 : (XSAGDNGL05) AGGMAP workspace object contains invalid syntax.
  • ora-07339 : spcre: maximum number of semaphore sets exceeded.
  • ora-23609 : unable to find directory object for directory string
  • Oracle Database Error Messages

    Oracle Database High Availability Any organization evaluating a database solution for enterprise data must also evaluate the High Availability (HA) capabilities of the database. Data is one of the most critical business assets of an organization. If this data is not available and/or not protected, companies may stand to lose millions of dollars in business downtime as well as negative publicity. Building a highly available data infrastructure is critical to the success of all organizations in today's fast moving economy.

    Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.